package com.copsec.railway.im.util;
import org.apache.log4j.Logger;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.cache.Cache;
import org.apache.shiro.cache.CacheManager;
import org.apache.shiro.subject.SimplePrincipalCollection;
import org.apache.shiro.subject.Subject;public class ShiroAuthorizationHelper {

    private static CacheManager cacheManager;

    private static Logger logger = Logger.getLogger(ShiroAuthorizationHelper.class);

    /**
     * 清除用户的权限
     * 
     *
     * @param principal 登陆用户对应的principal对象
     */
    public static void clearAuthorizationInfo(SimplePrincipalCollection principal) {
        logger.info("clear the user: " + principal.toString() + "'s authorizationInfo");
        Cache<Object, Object> cache = cacheManager.getCache("myShiroCache");
        cache.remove(principal);
    }

    /**
     * 清除当前用户的权限
     */
    public static void clearAuthorizationInfo() {
        if (SecurityUtils.getSubject().isAuthenticated()) {
            Subject subject = SecurityUtils.getSubject();
            String username = subject.getPrincipal().toString();
            String realmName = subject.getPrincipals().getRealmNames().iterator().next();
            SimplePrincipalCollection principalCollection = new SimplePrincipalCollection(username, realmName);
            logger.debug("get user principalCollection :"+principalCollection);
            // 调用清理用户权限
            clearAuthorizationInfo(principalCollection);
        }
    }

    /**
     * 由Spring bean将对象注入
     * @param cacheManager
     */
    public static void setCacheManager(CacheManager cacheManager) {
        
        ShiroAuthorizationHelper.cacheManager = cacheManager;
    }


}

完成后即可在logout controller中调用，进行清理权限信息。

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